#include <fstream>

// include headers that implement a archive in simple text format
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>

/////////////////////////////////////////////////////////////
// gps coordinate
//
// illustrates serialization for a simple type
//
class gps_position
{
private:
	friend class boost::serialization::access;
	// When the class Archive corresponds to an output archive, the
	// & operator is defined similar to <<.  Likewise, when the class Archive
	// is a type of input archive the & operator is defined similar to >>.
	template<class Archive>
	void serialize(Archive & ar, const unsigned int version)
	{
		ar & degrees;
		ar & minutes;
		ar & seconds;
	}
	int degrees;
	int minutes;
	float seconds;
public:
	gps_position(){};
	gps_position(int d, int m, float s) :
	degrees(d), minutes(m), seconds(s)
	{}
};

int main() {
	// create and open a character archive for output
	std::ofstream ofs("filename");

	// create class instance
	const gps_position g(35, 59, 24.567f);

	// save data to archive
	{
		boost::archive::text_oarchive oa(ofs);
		// write class instance to archive
		oa << g;
		// archive and stream closed when destructors are called
	}

	// ... some time later restore the class instance to its orginal state
	gps_position newg;
	{
		// create and open an archive for input
		std::ifstream ifs("filename");
		boost::archive::text_iarchive ia(ifs);
		// read class state from archive
		ia >> newg;
		// archive and stream closed when destructors are called
	}
	return 0;
}
